## Physical Properties of Crystals |

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Page 9

The angular relations between the axes may be specified by drawing up a table

of

3 || 081 032 033. Thus, for example, the

The angular relations between the axes may be specified by drawing up a table

of

**direction cosines**: “Old” 21 22 2.3 21 || 011 dig dis 'New' +4 | asl aas ass (11) 2:3 || 081 032 033. Thus, for example, the

**direction cosines**of ac, with respect to ...Page 26

Let l, now be the

The component of j parallel to E is (j. E)/E, or in suffix notation (j, E)/E.f Therefore

the conductivity in the direction l, is E2 T E2 Or, or = oi; l, ly. (33) This is the

general ...

Let l, now be the

**direction cosines**of E referred to general axes, so that E = Eli.The component of j parallel to E is (j. E)/E, or in suffix notation (j, E)/E.f Therefore

the conductivity in the direction l, is E2 T E2 Or, or = oi; l, ly. (33) This is the

general ...

Page 33

Relations between the

that, for a transformation from one orthogonal set of axes Oz, to another set Oz,

given by w 22 || 021 022 023 (1) 23 || 0.31 032 083 the nine coefficients at are not

...

Relations between the

**direction cosines**ag. We remarked in § 2.1 of Chapter Ithat, for a transformation from one orthogonal set of axes Oz, to another set Oz,

given by w 22 || 021 022 023 (1) 23 || 0.31 032 083 the nine coefficients at are not

...

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### Contents

THE GROUND WORK OF CRYSTAL PHYSICS | 3 |

Summary | 29 |

EQUILIBRIUM PROPERTIES | 45 |

47 other sections not shown

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### Common terms and phrases

angle anisotropic applied biaxial birefringence centre of symmetry Chapter conductivity constant crystal classes crystal properties crystal symmetry cube cubic crystals defined denoted diad axis dielectric direction cosines displacement elastic compliances electric field electro-optical electro-optical effect ellipsoid equal equation example expression follows forces given gives grad heat flow Hence indicatrix isothermal isotropic magnetic magnitude matrix notation measured moduli Mohr circle monoclinic number of independent Onsager's Principle optic axis optical activity orientation parallel permittivity perpendicular photoelastic effect piezoelectric effect plane plate polarization positive principal axes produced pyroelectric effect quadric radius vector referred refractive index relation representation quadric represents right-handed rotation scalar second-rank tensor shear shown shows strain stress symmetry elements Table temperature gradient thermal expansion thermodynamics thermoelectric effects Thomson heat tion transformation law trigonal uniaxial unit volume values wave normal wave surface written zero